Barbara (Brokaw) Urquhart, 80, of Great Falls, a former registered nurse, died of natural causes Thursday, Nov. 3, at a local hospital.Her memorial service is 11 a.m. Monday at Grace Baptist Church. Schnider Funeral Home is handling arrangements.Survivors include her sons James Urquhart of Boise, Idaho, and Scott Urquhart of Great Falls; a daughter, Constance Urquhart-Olson of Great Falls; and two grandchildren. She was preceded in death by her husband, Charles Chuck Urquhart, in 1998.